export function readFileDownload(data, msg) {
    var res = data
    if (res.type === 'application/json' || res.type === 'application/json;charset=UTF-8') {     // 失败的时候，注意ie兼容问题
    // if(true){
      let fileReader = new FileReader()
      fileReader.onload = function(event) {
        let jsonData = JSON.parse(this.result) // this.result是根据event，读取文件后打印的
        console.log(jsonData, '...............')
        if (jsonData.data === null && jsonData.code === 1) {
          Message({
            message: jsonData.msg || 'Error',
            type: 'error',
            duration: 5 * 1000
          })
        }
      }
      fileReader.readAsText(res)
    }
    if (res.type === 'application/octet-stream' || res.type === 'application/vnd.ms-excel' || res.type === 'application/vnd.ms-excel;charset=UTF-8') {
      console.log('success...')         // 成功，注意ie兼容问题
  
      const blob = new Blob([res], { type: 'application/vnd.ms-excel;charset=utf-8' })
  
      if (window.navigator && window.navigator.msSaveOrOpenBlob) {
        window.navigator.msSaveOrOpenBlob(blob, msg)
      } else {
        console.log(blob)
        const url = window.URL.createObjectURL(blob)
        console.log(url)
        const aLink = document.createElement('a')
        aLink.style.display = 'none'
        aLink.href = url
        aLink.setAttribute('download', msg)
        document.body.appendChild(aLink)
        aLink.click()
        document.body.removeChild(aLink)
        window.URL.revokeObjectURL(url)
      }
    }
  }